AR(augmented reality) based 3D workspace modeling for quality assessment using as-built on-site condition in remodeling construction project

In case of re-modeling construction project, it has various difficult situations to carrying out the projects comparing with general construction project. The re-modeling project needs to do several make decision makings which is to define the scope of utilization, extra works and O&M(operation & maintenance). Especially, the construction delays and cost-increase are caused by absence of reviews on existing building, especially structure and facilities conditions. Therefore, the objective of this study is establishment of 3D environment for augmented reality based decision-making for remodeling project management. The scan-data based 3D as-built model is generated by using LiDAR to provide AR based 3D information. The matching process between as-built model and model of additional structure is used to review for constructability. However, the method using AR technology based on marker has a limitation on reading range. This study proposes a marker-less AR rendering based method to set 3D environment using android based NFC tag technology. As a result, this study develops analysis method of constructability by matching between existing structure and remodelled structure. Through the process to establish 3D environment, there are following results expected. First, this method provides high-quality visual information to project participants. Second, the result of this study makes project managers easily to set rapid-decision by using mobile device.